一种多通道热电偶信号解调电路及补偿方法
By designing a multi-channel thermocouple signal demodulation circuit and compensation method, the problem of temperature measurement of thermocouples of different materials was solved, and multi-channel real-time and accurate temperature measurement was achieved, especially signal compensation when the ambient temperature changes in the engine system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WUHAN AVIATION INSTR
- Filing Date
- 2023-10-20
- Publication Date
- 2026-07-17
AI Technical Summary
Existing thermocouple temperature measurement methods are not applicable to thermocouples of different materials and cannot achieve multi-channel real-time and accurate temperature measurement, especially when the ambient temperature changes in the engine system, the signal needs to be compensated.
Design a multi-channel thermocouple signal demodulation circuit, including multiple thermocouples, thermocouple signal conditioning circuit, cold junction temperature measurement circuit, multi-channel A/D converter and digital signal processor. Temperature compensation is performed through temperature drift compensation algorithm and lookup table method to realize temperature calculation of multiple measurement points.
It enables temperature measurement of thermocouples of various materials, eliminates temperature drift due to changes in the cold junction environment, outputs high-precision temperature signals, has a simple circuit design, and is suitable for real-time and accurate temperature measurement at multiple measurement points.
Smart Images
Figure CN117664378B_ABST